Проблем с сетевой аутентификацией в openldap

[craft]

  Добрый день.
  У меня вознила такая проблема. Есть сервер под управлением CentOS 7 с настроенным и рабочим демоном OpenLdap (IP адрес 192.168.0.1/25, доменное имя domain.local, все машины в сети могут по этому доменному имени пинговать сервер, firewalld отключен, iptables не настроен).
  Мне нужно настроить сетевую аутентификацию в этом экземпляре OpenLdap на клиентским машинах под управлением Debian 8.
Питался делать по этому ману www.linux.com/news/linux-ldap-authentication и по сервер гиду ubuntu. Получились таки конфиги:

Код Выделить Развернуть

ldap.conf
#
# LDAP Defaults
#

# See ldap.conf(5) for details
# This file should be world readable but not world writable.

#BASE dc=example,dc=com
#URI ldap://ldap.example.com ldap://ldap-master.example.com:666

#SIZELIMIT 12
#TIMELIMIT 15
#DEREF never


BASE dc=domain,dc=local
URI ldap://192.168.0.1

# TLS certificates (needed for GnuTLS)
TLS_CACERT /etc/ssl/certs/ca-certificates.crt


Код Выделить Развернуть

libnss-ldap.conf
###DEBCONF###
# The configuration of this file will be done by debconf as long as the
# first line of the file says '###DEBCONF###'.
#
# You should use dpkg-reconfigure libnss-ldap to configure this file.
#
# @(#)$Id: ldap.conf,v 2.49 2009/04/25 01:53:15 lukeh Exp $
#
# This is the configuration file for the LDAP nameservice
# switch library and the LDAP PAM module.
#
# PADL Software
# http://www.padl.com
#

# Your LDAP server. Must be resolvable without using LDAP.
# Multiple hosts may be specified, each separated by a
# space. How long nss_ldap takes to failover depends on
# whether your LDAP client library supports configurable
# network or connect timeouts (see bind_timelimit).
#host 127.0.0.1

# The distinguished name of the search base.
base dc=domain,dc=local

# Another way to specify your LDAP server is to provide an
uri ldapi://192.168.0.1
# Unix Domain Sockets to connect to a local LDAP Server.
#uri ldap://127.0.0.1/
#uri ldaps://127.0.0.1/   
#uri ldapi://%2fvar%2frun%2fldapi_sock/
# Note: %2f encodes the '/' used as directory separator

# The LDAP version to use (defaults to 3
# if supported by client library)
ldap_version 3

# The distinguished name to bind to the server with.
# Optional: default is to bind anonymously.
# Please do not put double quotes around it as they
# would be included literally.
#binddn cn=proxyuser,dc=padl,dc=com

# The credentials to bind with.
# Optional: default is no credential.
#bindpw secret

# The distinguished name to bind to the server with
# if the effective user ID is root. Password is
# stored in /etc/libnss-ldap.secret (mode 600)
# Use 'echo -n "mypassword" > /etc/libnss-ldap.secret' instead
# of an editor to create the file.
rootbinddn cn=Manager,dc=domain,dc=local

# The port.
# Optional: default is 389.
port 389

# The search scope.
#scope sub
#scope one
#scope base

# Search timelimit in seconds (0 for indefinite; default 0)
#timelimit 0

# Bind/connect timelimit (0 for indefinite; default 30)
#bind_timelimit 30

# Reconnect policy:
#  hard_open: reconnect to DSA with exponential backoff if
#             opening connection failed
#  hard_init: reconnect to DSA with exponential backoff if
#             initializing connection failed
#  hard:      alias for hard_open
#  soft:      return immediately on server failure
#bind_policy hard

# Connection policy:
#  persist:   DSA connections are kept open (default)
#  oneshot:   DSA connections destroyed after request
#nss_connect_policy persist

# Idle timelimit; client will close connections
# (nss_ldap only) if the server has not been contacted
# for the number of seconds specified below.
#idle_timelimit 3600

# Use paged rseults
#nss_paged_results yes

# Pagesize: when paged results enable, used to set the
# pagesize to a custom value
#pagesize 1000

# Filter to AND with uid=%s
#pam_filter objectclass=account

# The user ID attribute (defaults to uid)
#pam_login_attribute uid

# Search the root DSE for the password policy (works
# with Netscape Directory Server)
#pam_lookup_policy yes

# Check the 'host' attribute for access control
# Default is no; if set to yes, and user has no
# value for the host attribute, and pam_ldap is
# configured for account management (authorization)
# then the user will not be allowed to login.
#pam_check_host_attr yes

# Check the 'authorizedService' attribute for access
# control
# Default is no; if set to yes, and the user has no
# value for the authorizedService attribute, and
# pam_ldap is configured for account management
# (authorization) then the user will not be allowed
# to login.
#pam_check_service_attr yes

# Group to enforce membership of
#pam_groupdn cn=PAM,ou=Groups,dc=padl,dc=com

# Group member attribute
#pam_member_attribute uniquemember

# Specify a minium or maximum UID number allowed
#pam_min_uid 0
#pam_max_uid 0

# Template login attribute, default template user
# (can be overriden by value of former attribute
# in user's entry)
#pam_login_attribute userPrincipalName
#pam_template_login_attribute uid
#pam_template_login nobody

# HEADS UP: the pam_crypt, pam_nds_passwd,
# and pam_ad_passwd options are no
# longer supported.
#
# Do not hash the password at all; presume
# the directory server will do it, if
# necessary. This is the default.
#pam_password clear

# Hash password locally; required for University of
# Michigan LDAP server, and works with Netscape
# Directory Server if you're using the UNIX-Crypt
# hash mechanism and not using the NT Synchronization
# service.
#pam_password crypt

# Remove old password first, then update in
# cleartext. Necessary for use with Novell
# Directory Services (NDS)
#pam_password nds

# RACF is an alias for the above. For use with
# IBM RACF
#pam_password racf

# Update Active Directory password, by
# creating Unicode password and updating
# unicodePwd attribute.
#pam_password ad

# Use the OpenLDAP password change
# extended operation to update the password.
#pam_password exop

# Redirect users to a URL or somesuch on password
# changes.
#pam_password_prohibit_message Please visit http://internal to change your password.

# Use backlinks for answering initgroups()
#nss_initgroups backlink

# Enable support for RFC2307bis (distinguished names in group
# members)
#nss_schema rfc2307bis

# RFC2307bis naming contexts
# Syntax:
# nss_base_XXX base?scope?filter
# where scope is {base,one,sub}
# and filter is a filter to be &'d with the
# default filter.
# You can omit the suffix eg:
# nss_base_passwd ou=People,
# to append the default base DN but this
# may incur a small performance impact.
#nss_base_passwd ou=People,dc=padl,dc=com?one
#nss_base_shadow ou=People,dc=padl,dc=com?one
#nss_base_group ou=Group,dc=padl,dc=com?one
#nss_base_hosts ou=Hosts,dc=padl,dc=com?one
#nss_base_services ou=Services,dc=padl,dc=com?one
#nss_base_networks ou=Networks,dc=padl,dc=com?one
#nss_base_protocols ou=Protocols,dc=padl,dc=com?one
#nss_base_rpc ou=Rpc,dc=padl,dc=com?one
#nss_base_ethers ou=Ethers,dc=padl,dc=com?one
#nss_base_netmasks ou=Networks,dc=padl,dc=com?ne
#nss_base_bootparams ou=Ethers,dc=padl,dc=com?one
#nss_base_aliases ou=Aliases,dc=padl,dc=com?one
#nss_base_netgroup ou=Netgroup,dc=padl,dc=com?one

# attribute/objectclass mapping
# Syntax:
#nss_map_attribute rfc2307attribute mapped_attribute
#nss_map_objectclass rfc2307objectclass mapped_objectclass

# configure --enable-nds is no longer supported.
# NDS mappings
#nss_map_attribute uniqueMember member

# Services for UNIX 3.5 mappings
#nss_map_objectclass posixAccount User
#nss_map_objectclass shadowAccount User
#nss_map_attribute uid msSFU30Name
#nss_map_attribute uniqueMember msSFU30PosixMember
#nss_map_attribute userPassword msSFU30Password
#nss_map_attribute homeDirectory msSFU30HomeDirectory
#nss_map_attribute homeDirectory msSFUHomeDirectory
#nss_map_objectclass posixGroup Group
#pam_login_attribute msSFU30Name
#pam_filter objectclass=User
#pam_password ad

# configure --enable-mssfu-schema is no longer supported.
# Services for UNIX 2.0 mappings
#nss_map_objectclass posixAccount User
#nss_map_objectclass shadowAccount user
#nss_map_attribute uid msSFUName
#nss_map_attribute uniqueMember posixMember
#nss_map_attribute userPassword msSFUPassword
#nss_map_attribute homeDirectory msSFUHomeDirectory
#nss_map_attribute shadowLastChange pwdLastSet
#nss_map_objectclass posixGroup Group
#nss_map_attribute cn msSFUName
#pam_login_attribute msSFUName
#pam_filter objectclass=User
#pam_password ad

# RFC 2307 (AD) mappings
#nss_map_objectclass posixAccount user
#nss_map_objectclass shadowAccount user
#nss_map_attribute uid sAMAccountName
#nss_map_attribute homeDirectory unixHomeDirectory
#nss_map_attribute shadowLastChange pwdLastSet
#nss_map_objectclass posixGroup group
#nss_map_attribute uniqueMember member
#pam_login_attribute sAMAccountName
#pam_filter objectclass=User
#pam_password ad

# configure --enable-authpassword is no longer supported
# AuthPassword mappings
#nss_map_attribute userPassword authPassword

# AIX SecureWay mappings
#nss_map_objectclass posixAccount aixAccount
#nss_base_passwd ou=aixaccount,?one
#nss_map_attribute uid userName
#nss_map_attribute gidNumber gid
#nss_map_attribute uidNumber uid
#nss_map_attribute userPassword passwordChar
#nss_map_objectclass posixGroup aixAccessGroup
#nss_base_group ou=aixgroup,?one
#nss_map_attribute cn groupName
#nss_map_attribute uniqueMember member
#pam_login_attribute userName
#pam_filter objectclass=aixAccount
#pam_password clear

# For pre-RFC2307bis automount schema
#nss_map_objectclass automountMap nisMap
#nss_map_attribute automountMapName nisMapName
#nss_map_objectclass automount nisObject
#nss_map_attribute automountKey cn
#nss_map_attribute automountInformation nisMapEntry

# Netscape SDK LDAPS
#ssl on

# Netscape SDK SSL options
#sslpath /etc/ssl/certs

# OpenLDAP SSL mechanism
# start_tls mechanism uses the normal LDAP port, LDAPS typically 636
#ssl start_tls
#ssl on

# OpenLDAP SSL options
# Require and verify server certificate (yes/no)
# Default is to use libldap's default behavior, which can be configured in
# /etc/openldap/ldap.conf using the TLS_REQCERT setting.  The default for
# OpenLDAP 2.0 and earlier is "no", for 2.1 and later is "yes".
#tls_checkpeer yes

# CA certificates for server certificate verification
# At least one of these are required if tls_checkpeer is "yes"
#tls_cacertfile /etc/ssl/ca.cert
#tls_cacertdir /etc/ssl/certs

# Seed the PRNG if /dev/urandom is not provided
#tls_randfile /var/run/egd-pool

# SSL cipher suite
# See man ciphers for syntax
#tls_ciphers TLSv1

# Client certificate and key
# Use these, if your server requires client authentication.
#tls_cert
#tls_key

# Disable SASL security layers. This is needed for AD.
#sasl_secprops maxssf=0

# Override the default Kerberos ticket cache location.
#krb5_ccname FILE:/etc/.ldapcache


Код Выделить Развернуть

nscd.conf
#
# /etc/nscd.conf
#
# An example Name Service Cache config file.  This file is needed by nscd.
#
# Legal entries are:
#
# logfile <file>
# debug-level <level>
# threads <initial #threads to use>
# max-threads <maximum #threads to use>
# server-user             <user to run server as instead of root>
# server-user is ignored if nscd is started with -S parameters
#       stat-user               <user who is allowed to request statistics>
# reload-count unlimited|<number>
# paranoia <yes|no>
# restart-interval <time in seconds>
#
#       enable-cache <service> <yes|no>
# positive-time-to-live <service> <time in seconds>
# negative-time-to-live   <service> <time in seconds>
#       suggested-size <service> <prime number>
# check-files <service> <yes|no>
# persistent <service> <yes|no>
# shared <service> <yes|no>
# max-db-size <service> <number bytes>
# auto-propagate <service> <yes|no>
#
# Currently supported cache names (services): passwd, group, hosts, services
#


# logfile /var/log/nscd.log
# threads 4
# max-threads 32
# server-user nobody
# stat-user somebody
        logfile /var/log/nscd
debug-level 4
# reload-count 5
paranoia no
# restart-interval 3600

enable-cache passwd yes
positive-time-to-live passwd 600
negative-time-to-live passwd 20
suggested-size passwd 211
check-files passwd yes
persistent passwd yes
shared passwd yes
max-db-size passwd 33554432
auto-propagate passwd yes

enable-cache group yes
positive-time-to-live group 3600
negative-time-to-live group 60
suggested-size group 211
check-files group yes
persistent group yes
shared group yes
max-db-size group 33554432
auto-propagate group yes

enable-cache hosts yes
positive-time-to-live hosts 3600
negative-time-to-live hosts 20
suggested-size hosts 211
check-files hosts yes
persistent hosts yes
shared hosts yes
max-db-size hosts 33554432

enable-cache services yes
positive-time-to-live services 28800
negative-time-to-live services 20
suggested-size services 211
check-files services yes
persistent services yes
shared services yes
max-db-size services 33554432

enable-cache netgroup yes
positive-time-to-live netgroup 28800
negative-time-to-live netgroup 20
suggested-size netgroup 211
check-files netgroup yes
persistent netgroup yes
shared netgroup yes
max-db-size netgroup 33554432


Код Выделить Развернуть

nsswitch.conf
# /etc/nsswitch.conf
#
# Example configuration of GNU Name Service Switch functionality.
# If you have the `glibc-doc-reference' and `info' packages installed, try:
# `info libc "Name Service Switch"' for information about this file.

passwd:         ldap   compat
group:          ldap   compat
shadow:         ldap   compat
gshadow:        files

hosts:          files dns
networks:       files

protocols:      db files
services:       db files
ethers:         db files
rpc:            db files

netgroup:       nis


Код Выделить Развернуть

common-account
#
# /etc/pam.d/common-account - authorization settings common to all services
#
# This file is included from other service-specific PAM config files,
# and should contain a list of the authorization modules that define
# the central access policy for use on the system.  The default is to
# only deny service to users whose accounts are expired in /etc/shadow.
#
# As of pam 1.0.1-6, this file is managed by pam-auth-update by default.
# To take advantage of this, it is recommended that you configure any
# local modules either before or after the default block, and use
# pam-auth-update to manage selection of other modules.  See
# pam-auth-update(8) for details.
#

account sufficient pam_ldap.so
account required pam_unix.so try_first_pass

# here are the per-package modules (the "Primary" block)
account [success=2 new_authtok_reqd=done default=ignore] pam_unix.so
account [success=1 default=ignore] pam_ldap.so
# here's the fallback if no module succeeds
account requisite pam_deny.so
# prime the stack with a positive return value if there isn't one already;
# this avoids us returning an error just because nothing sets a success code
# since the modules above will each just jump around
account required pam_permit.so
# and here are more per-package modules (the "Additional" block)
# end of pam-auth-update config


Код Выделить Развернуть

common-auth
#
# /etc/pam.d/common-auth - authentication settings common to all services
#
# This file is included from other service-specific PAM config files,
# and should contain a list of the authentication modules that define
# the central authentication scheme for use on the system
# (e.g., /etc/shadow, LDAP, Kerberos, etc.).  The default is to use the
# traditional Unix authentication mechanisms.
#
# As of pam 1.0.1-6, this file is managed by pam-auth-update by default.
# To take advantage of this, it is recommended that you configure any
# local modules either before or after the default block, and use
# pam-auth-update to manage selection of other modules.  See
# pam-auth-update(8) for details.

auth sufficient pam_ldap.so
auth required pam_unix.so nullok_secure try_first_pass

# here are the per-package modules (the "Primary" block)
auth [success=2 default=ignore] pam_unix.so nullok_secure
auth [success=1 default=ignore] pam_ldap.so use_first_pass
# here's the fallback if no module succeeds
auth requisite pam_deny.so
# prime the stack with a positive return value if there isn't one already;
# this avoids us returning an error just because nothing sets a success code
# since the modules above will each just jump around
auth required pam_permit.so
# and here are more per-package modules (the "Additional" block)
# end of pam-auth-update config


Код Выделить Развернуть

common-password
#
# /etc/pam.d/common-password - password-related modules common to all services
#
# This file is included from other service-specific PAM config files,
# and should contain a list of modules that define the services to be
# used to change user passwords.  The default is pam_unix.

# Explanation of pam_unix options:
#
# The "sha512" option enables salted SHA512 passwords.  Without this option,
# the default is Unix crypt.  Prior releases used the option "md5".
#
# The "obscure" option replaces the old `OBSCURE_CHECKS_ENAB' option in
# login.defs.
#
# See the pam_unix manpage for other options.

# As of pam 1.0.1-6, this file is managed by pam-auth-update by default.
# To take advantage of this, it is recommended that you configure any
# local modules either before or after the default block, and use
# pam-auth-update to manage selection of other modules.  See
# pam-auth-update(8) for details.

password sufficient pam_ldap.so
password required pam_unix.so nullok obscure min=4 max=8 md5 try_first_pass

# here are the per-package modules (the "Primary" block)
password [success=2 default=ignore] pam_unix.so obscure sha512
password [success=1 user_unknown=ignore default=die] pam_ldap.so use_authtok try_first_pass
# here's the fallback if no module succeeds
password requisite pam_deny.so
# prime the stack with a positive return value if there isn't one already;
# this avoids us returning an error just because nothing sets a success code
# since the modules above will each just jump around
password required pam_permit.so
# and here are more per-package modules (the "Additional" block)
# end of pam-auth-update config


В результате чего у меня вышла ошибка nslcd can't contact ldap server. Сам посибе с клиента ldapsearch читает каталог ldap. Где может быть ошибка ? Можете подсказать пожалуйста ?

[ihammers]

После установки и настройки перезапускали сервис nscd?

Код Выделить Развернуть

~# ldapsearch -h <ldapserver> -b dc=<your>,dc=<domain> -x uid=<username>

PS: сервер времени (ntp) на сервере с ldap установлен и время везде одинаковое?

[craft]

После переустановки nscd перезапускал, результат тот же. Ldapsearch на клиенте отрабатывает нормально. Спасибо за подсказку про время, сейчас проверю.

[craft]

   Доброго времени суток.
   После продолжительной возни все таки получилось победить эту проблему. Алгоритм настройки сетевой аутентификации в Debian 7/8 в OpenLDAP с нуля таков:

   1. Ставим необходимые пакеты sudo apt-get install libnss-ldap libpam-ldap nscd;
   2. Во время авто конфигурации пакетов все оставляем по умолчанию;
   3. sudo dpkg-recofigure libnss-ldap;
      a. Универсальный идентификатор ресурса сервера LDAP -> ldap://SERVER_IP_ADDRESS;
      b. Индивидуальное имя базы поиска -> dc=yuo_name,dc=domain;
      c. Использовать версию LDAP -> 3;
      d. База данных LDAP требует учетное имя -> no;
      e. Специальные привилегии LDAP для root -> yes;
      f.  Разрешить чтение/запись в файл настройки только его владельцу -> no;
      g. Учетная запись LDAP для root -> cn=admin,dc=yuo_name,dc=domain;
      h. Пароль учетной записи LDAP для root -> ***********;
   4. sudo dpkg-reconfigure libpam-ldap;
      a. URI сервера LDAP -> ldap://SERVER_IP_ADDRESS;
      b. Индивидуальное имя базы поиска -> dc=yuo_name,dc=domain;
      c. Использовать версию LDAP -> 3;
      d. Разрешить учетной записи LDAP admin вести себя как root -> yes;
      e. База данных LDAP требует входа -> yes;
      f. Административная учётная запись LDAP -> cn=admin,dc=yuo_name,dc=domain;
      g. Пароль к административной учетной записи LDAP: **********;
      h. Пользователь учётной записи LDAP -> cn=admin,dc=yuo_name,dc=domain;
      i. Пароль для учётной записи LDAP: *********;
      k. Алгоритм локального шифрования -> crypt;
      l. Активируемые профили PAM -> ok;
   5. Добавляем несколько параметров в sudo vim /etc/nsswitch.conf:
       passwd:          compat ldap
       group:            compat ldap
       shadow:         compat ldap
       host:             file dns ldap
   6. Дописываем в строку в файл sudo vim /etc/pam/common-session
       session required               pam_mkhomedir.so
   7. Выполняем sudo pam-auth-update;
   8. Пере запускаем nscd:
      a. Для Debian 8 sudo systemctl restart nscd.service;
      b. Для Debian 7 sudo service nscd restart;
   9. Проверяем sudo getent passwd и su ldap_user_name;